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SP3085E Datasheet(PDF) 1 Page - Exar Corporation |
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SP3085E Datasheet(HTML) 1 Page - Exar Corporation |
1 / 25 page 1 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 DESCRIPTION FEATURES APPLICATIONS SP3080E-3088E Advanced-Failsafe RS-485/RS-422 Transceivers 1/8th Unit Load, Slew-Rate Limited, ±15kV ESD-Protected • 5.0V single supply operation • Receiver failsafe on open, shorted or terminated lines • 1/8th Unit Load, 256 transceivers on bus • Robust ESD protection for RS-485 pins o ±15kV Air-Gap Discharge o ±15kV Human Body Model o ±8kV Contact Discharge • Controlled driver slew rates o 115kbps, Low EMI (SP3080E, SP3081E, SP3082E) o 500kbps, Low EMI (SP3083E, SP3084E, SP3085E) o High Speed, 20Mbps (SP3086E, SP3087E, SP3088E) •Hot Swap glitch protection on control inputs •Driver short circuit current limit and thermal shutdown for overload protection •Ultra-low 400μA quiescent current •1μA shutdown mode (except SP3081, SP3084, SP3087) •Industry standard package footprints • Motor Control • Building Automation • Security Systems • Remote Meter Reading • Long or un-terminated transmission lines The SP3080E-SP3088E family of RS-485 devices are designed for reliable, bidirectional commu- nication on multipoint bus transmission lines. Each device contains one differential driver and one differential receiver. The SP3082E, SP3085E and SP3088E are half-duplex devices; other part num- bers are full-duplex. All devices comply with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and RoHS compliant packages are available for all models. These devices are ruggedized for use in harsh operating conditions over the entire common-mode voltage range from -7V to +12V. Receivers are specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted. All RS-485 bus-pins are protected against severe ESD events up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge (IEC 1000- 4-2). Drivers are protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown. Devices are rated for industrial (-40 to +85ºC) operating temperatures. Receivers have exceptionally high input impedance, which places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while pre- serving full signal margin. All devices operate from a single 5.0V power supply and draw negligible quiescent power. All ver- sions except the SP3081E, SP3084E, and SP3087E may independently enable and disable their driver and receiver and enter a low power shutdown mode if both driver and receiver are disabled. All outputs maintain high impedance in shutdown or when powered-off. 8 PIN NSOIC SP3082E SP3085E SP3088E Half Duplex 8 PIN NSOIC SP3081E SP3084E SP3087E Full Duplex 1 2 3 4 5 6 7 8 5 6 7 8 1 2 3 4 14 PIN NSOIC SP3080E SP3083E SP3086E Full Duplex 1 2 3 4 5 6 7 8 9 10 11 12 13 14 NC RO RE DE DI GND GND Vcc NC A B Z Y NC Vcc RO DI GND A B Z Y GND A B Vcc RO RE DE DI |
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